/* Reset and Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --color-bg: #ffffff;
    --color-text: #333333;
    --color-primary: #1a1a1a;
    --color-secondary: #555555;
    --color-accent: #0056b3; /* Tasteful blue accent */
    --color-accent-hover: #003d82;
    --color-border: #dddddd;
    --color-light-bg: #f4f4f4;
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

body {
    font-family: var(--font-main);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 0;
}

/* Header & Navigation */
.main-header {
    background-color: var(--color-primary);
    color: white;
    border-bottom: 3px solid var(--color-accent);
}

.main-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.logo img {
    max-height: 80px;
    background: white; /* Contrast for grayscale logo on dark bg */
    padding: 5px;
    border-radius: 4px;
}

.main-nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

.main-nav a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 3px;
    transition: background-color 0.3s;
}

.main-nav a:hover {
    background-color: var(--color-secondary);
}

/* Main Content Area */
main {
    flex: 1;
}

h1, h2, h3 {
    margin-bottom: 15px;
    color: var(--color-primary);
}

p {
    margin-bottom: 15px;
}

/* Buttons and Forms */
.btn {
    display: inline-block;
    background-color: var(--color-accent);
    color: white;
    padding: 10px 15px;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: var(--color-accent-hover);
}

.btn-danger {
    background-color: #d9534f;
}

.btn-danger:hover {
    background-color: #c9302c;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-main);
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 5px;
}

/* Cards & Grid Layouts */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background: var(--color-light-bg);
    border: 1px solid var(--color-border);
    border-radius: 5px;
    padding: 15px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.card img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 10px;
}

/* Profile Layouts */
.profile-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-start;
}

.profile-sidebar {
    flex: 1;
    min-width: 250px;
    max-width: 300px;
}

.profile-main {
    flex: 2;
    min-width: 300px;
}

.profile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
}

/* Form Row Groupings for Desktop */
.form-row {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 15px;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
    min-width: 200px;
}

.form-row.row-3 .form-group {
    flex: 1 1 calc(33.333% - 10px);
}

/* Calendar Badge */
.calendar-badge {
    display: inline-block;
    width: 120px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    background: #fff;
    border: 1px solid var(--color-border);
}

.calendar-badge .cal-top {
    color: white;
    font-weight: bold;
    text-transform: uppercase;
    padding: 8px 5px;
    font-size: 1rem;
    letter-spacing: 1px;
}

.calendar-badge .cal-body {
    font-size: 3rem;
    font-weight: bold;
    color: var(--color-primary);
    padding: 10px 0;
    line-height: 1;
}

.calendar-badge.green .cal-top {
    background-color: #28a745;
}

.calendar-badge.amber .cal-top {
    background-color: #ffc107;
    color: #333;
}

.calendar-badge.red .cal-top {
    background-color: #dc3545;
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

table th, table td {
    border: 1px solid var(--color-border);
    padding: 10px;
    text-align: left;
}

table th {
    background-color: var(--color-light-bg);
}

/* Footer */
.main-footer {
    background-color: var(--color-primary);
    color: white;
    text-align: center;
    padding: 20px 0;
    margin-top: auto;
}

/* Hamburger Menu */
.hamburger-btn {
    display: none;
    background: none;
    border: none;
    color: white;
    font-size: 1.8rem;
    cursor: pointer;
    padding: 5px;
}

/* Responsive */
@media (max-width: 768px) {
    .main-header .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
        position: relative;
    }

    .hamburger-btn {
        display: block;
    }

    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--color-primary);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        z-index: 1000;
        border-bottom: 0 solid var(--color-accent);
    }

    .main-nav.show {
        display: block;
        max-height: 500px; /* Large enough to fit all links */
        border-bottom-width: 3px;
        box-shadow: 0 4px 6px rgba(0,0,0,0.3);
    }

    .main-nav ul {
        display: flex;
        flex-direction: column;
        gap: 0;
        margin: 0;
        padding: 10px 0;
    }

    .main-nav li {
        width: 100%;
        text-align: center;
    }

    .main-nav a {
        display: block;
        padding: 15px;
        border-radius: 0;
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }

    .main-nav li:last-child a {
        border-bottom: none;
    }
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: var(--color-bg);
    margin: 10% auto;
    padding: 20px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    position: relative;
}

.modal .close {
    color: var(--color-secondary);
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
}

.modal .close:hover,
.modal .close:focus {
    color: #fff;
    text-decoration: none;
    cursor: pointer;
}